Question

the question is x 2 + 2 X + 1 and X value is -1 but in the book the answer is written its zero so how can come the zero so please give me the answer.

Answer 1

x^2+2x+1

=-1^2+2×-1+1

=1-2+1

=2-2

=0

Answer 2

The answer is -1 I have verified it may be there's a mistake in the book